/Engine/Source/Editor/GraphEditor/Public/SGraphNodeComment.h
Populate the brushes array with any overlay brushes to render
virtual void GetOverlayBrushes ( bool bSelected, const FVector2D WidgetSize, [TArray](API\Runtime\Core\Containers\TArray)< [FOverlayBrushInfo](API\Editor\GraphEditor\FOverlayBrushInfo) > & Brushes ) const